Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: June 7, 2023
Human
metabolite
moisture
detection
is
important
in
health
monitoring
and
non-invasive
diagnosis.
However,
ultra-sensitive
quantitative
extraction
of
respiration
information
real-time
remains
a
great
challenge.
Herein,
chemiresistors
based
on
imine-linked
covalent
organic
framework
(COF)
films
with
dual-active
sites
are
fabricated
to
address
this
issue,
which
demonstrates
an
amplified
humidity-sensing
signal
performance.
By
regulation
monomers
functional
groups,
these
COF
can
be
pre-engineered
achieve
high
response,
wide
range,
fast
recovery
time.
Under
the
condition
relative
humidity
ranging
from
13
98%,
COFTAPB-DHTA
film-based
sensor
exhibits
outstanding
sensing
performance
expanded
response
value
390
times.
Furthermore,
values
highly
linear
range
below
60%,
reflecting
mechanism
at
molecular
level.
Based
dual-site
adsorption
(-C=N-)
(C-N)
stretching
vibrations,
reversible
tautomerism
induced
by
hydrogen
bonding
water
molecules
demonstrated
main
intrinsic
for
effective
detection.
In
addition,
synthesized
further
exploited
effectively
detect
human
nasal
oral
breathing
as
well
fabric
permeability,
will
inspire
novel
designs
humidity-detection
devices.
Journal of the American Chemical Society,
Journal Year:
2024,
Volume and Issue:
146(6), P. 3567 - 3584
Published: Feb. 1, 2024
Covalent
organic
frameworks
(COFs)
are
an
emerging
class
of
highly
porous
crystalline
polymers
comprised
entirely
linkers
connected
by
strong
covalent
bonds.
Due
to
their
excellent
physicochemical
properties
(e.g.,
ordered
structure,
porosity,
and
stability),
COFs
considered
ideal
materials
for
developing
state-of-the-art
separation
membranes.
In
fact,
significant
advances
have
been
made
in
the
last
six
years
regarding
fabrication
functionalization
COF
particular,
utilized
obtain
thin-film,
composite,
mixed
matrix
membranes
that
could
achieve
effective
rejection
(mostly
above
80%)
dyes
model
foulants
humic
acid).
COF-based
membranes,
especially
those
prepared
embedding
into
polyamide
thin-films,
obtained
adequate
salts
desalination
applications.
However,
claims
structure
mechanisms
remain
unclear
debatable.
this
perspective,
we
analyze
critically
design
exploitation
membrane
performance
water
treatment
addition,
technological
challenges
associated
with
properties,
methods,
efficacy
highlighted
redirect
future
research
efforts
realizing
selective
scale-up
industrial
Angewandte Chemie International Edition,
Journal Year:
2023,
Volume and Issue:
62(23)
Published: April 4, 2023
Two-dimensional
graphene
oxide
(GO)
membranes
are
gaining
popularity
as
a
promising
means
to
address
global
water
scarcity.
However,
current
GO
fail
sufficiently
exclude
angstrom-sized
ions
from
solution.
Herein,
de
novo
"posterior"
interfacial
polymerization
(p-IP)
strategy
is
reported
construct
tailor-made
polyamide
(PA)
network
in
situ
an
ultrathin
membrane
strengthen
size
exclusion
while
imparting
positively
charged
surface
repel
metal
ions.
The
electrostatic
repulsion
toward
ions,
coupled
with
the
reinforced
exclusion,
synergistically
drives
high-efficiency
ion
separation
through
synthesized
framework
(PC-GOF)
membrane.
This
dual-mechanism-driven
PC-GOF
exhibits
superior
rejection,
anti-fouling
ability,
good
operational
stability,
and
ultra-high
permeance
(five
times
that
of
pristine
membranes),
enabling
sound
step
towards
sustainable
water-energy-food
nexus.
Nano-Micro Letters,
Journal Year:
2023,
Volume and Issue:
15(1)
Published: June 7, 2023
Human
metabolite
moisture
detection
is
important
in
health
monitoring
and
non-invasive
diagnosis.
However,
ultra-sensitive
quantitative
extraction
of
respiration
information
real-time
remains
a
great
challenge.
Herein,
chemiresistors
based
on
imine-linked
covalent
organic
framework
(COF)
films
with
dual-active
sites
are
fabricated
to
address
this
issue,
which
demonstrates
an
amplified
humidity-sensing
signal
performance.
By
regulation
monomers
functional
groups,
these
COF
can
be
pre-engineered
achieve
high
response,
wide
range,
fast
recovery
time.
Under
the
condition
relative
humidity
ranging
from
13
98%,
COFTAPB-DHTA
film-based
sensor
exhibits
outstanding
sensing
performance
expanded
response
value
390
times.
Furthermore,
values
highly
linear
range
below
60%,
reflecting
mechanism
at
molecular
level.
Based
dual-site
adsorption
(-C=N-)
(C-N)
stretching
vibrations,
reversible
tautomerism
induced
by
hydrogen
bonding
water
molecules
demonstrated
main
intrinsic
for
effective
detection.
In
addition,
synthesized
further
exploited
effectively
detect
human
nasal
oral
breathing
as
well
fabric
permeability,
will
inspire
novel
designs
humidity-detection
devices.
